The 13″ Alpha Rails with built in sights are not compatible with Rifle length or Intermediate length gas systems. For those who want the best from a free floating rail system this package from TROY is it! We've tested this system against others and have come to the conclusion that if you want the durability of a non-plastic hand-guard setup with no more added weight... The TROY TRX Alpha rail system is for you!

Special Note
The Troy Alpha Series Rail System does not include a Mil-Spec barrel nut. If you already have a Mil-Spec barrel nut, use it. Or if you're OCD like we are, a new Mil-Spec barrel nut can be found per this link:
AlphaOps Mil-Spec Barrel Nut

Product Description
The genesis of modular free float rails has arrived. Building off the TRX Extreme design that revolutionized rail based hand guards; the Alpha Rail® utilizes a new low-profile locking mechanism, which offers unparalleled strength and stability. The Alpha Rail® disperses heat and runs cooler than other close to the barrel rail systems.

With unlimited mounting options and greater heat dispersion, the Alpha Rail® once again sets a new industry standard in modular free float rail design. Comes with three detachable rails and all mounting hardware. Troy® Alpha Rail® is machined from 6061-T6 hardened aircraft aluminum and finished in MIL-SPEC Type III Hard Coat Anodizing. Works with standard AR15/M16 barrel nut. Patent Pending. Made in the U.S.A. Available in Black and Flat Dark Earth.